- PART B: Patients must be proven to meet marker criteria (FGFR1 silver in situ hybridization (SISH) + in situ hybridization (ISH) +, FGFR1 SISH+ ISH negative [-ve], FGFR1 SISH-ve ISH+, FGFR1 SISH-ve ISH-ve [FGFR1 double negative cohort] or ret proto-oncogene [RET] FISH+) prior to enrollment into Part B (treatment); adenocarcinoma patients must be known to not possess either an EGFR mutation or an ALK rearrangement in their tumor (if positive for one, testing for both is not required)